Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"all pass."”.
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All Pass Readout With Ring Resonators for Qubit Measurement
… port as a capacitor in the feedline, which allows for directionality in the readout signal. However, this impedance mismatch creates problems with resonator linewidth variation, standing waves, and voltage nodes in the feedline, leading to challenges in scaling to larger frequency …
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Black Box Modeling of Passive Systems by Rational Function Approximation
The modified minimum phase, all pass, and delay (MAD) method for black-box modeling is proposed and validated. Using this method, a black-box system is modeled as three parts, a minimum phase subsystem, an all-pass subsystem, and a delay term. Since this model precisely capture the physical …
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Tunable Filters and Interference Rejection System for Interferer Suppression at RF and Microwave Bands
… access a wideband or multiband spectrum dynamically. It is desirable for the wireless systems to have high frequency selectivity early in the receiver chain at RF to relax the dynamic range requirements of subsequent stages. However, integration of high selectivity RF band-pass filters (BPF), or …
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Modeling and design of an active silicon cochlea
… O(N²) efficiency due to their use of an exponentially tapered filter cascade. They are useful in speech-recognition front ends, cochlear implants, and hearing aids, especially as architectures for improving spectral analysis in noisy environments and for performing low-power spectrum analysis. In …
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Conversor DSB-SSB a capacitores chaveados por transformador de Hilbert em tecnologia CMOS de 180 nm
… advantage of high processing capacity from parallel digital circuits to obtain the Hilbert transformer by means of high-order Finite Impulse Response (FIR) filters. Fabricated in a 180 nm CMOS technology with metal-metal (MiM) capacitors, the use of structurally all-pass filters greatly reduces …
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An investigation of the utility of monaural sound source separation via nonnegative matrix factorization applied to acoustic echo and reverberation mitigation for hands-free telephony
… DTD. We also show that this property allows its paired AEC to converge at a rate close to the optimum. Another focus of this thesis is the problem of inverting a single measurement of a non- minimum phase Room Impulse Response (RIR). We describe the process by which percep- tually …
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Pulse Shaping Filter Design and Interference Analysis in UWB Communication Systems
… maxima, genetic algorithms are adopted in this all-pass filter optimization. Third, a novel analytical method of assessing the narrowband performance degradation due to UWB interferences is proposed. This method models the UWB interferences as a composite signal of white Gaussian noise and …
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Turbo coding and equalization for wireless communication systems
… the channel decoder that are independent identically distributed Gaussian random variables. The prefiltering method is considered in this thesis, where an all-pass filter is employed at the receiver before equalization to create a minimum phase overall impulse response. The band limited channel …
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Scalable and Reconfigurable True-Time Delay Line for Integrated Radio-Frequency Recurrent Neural Processors
… The original RF-domain RNN structure relies on a passive tapped transmission line delay for sequential input samples, limiting the architecture's scalability, power efficiency, and frequency adaptability. Transmission lines have too much attenuation, become impractically large for chip …
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Characterizing middle ear reflectance via pole-zero fitting
… using this method, including data from Voss and Allen [1994], Rosowski et al. [2012], Nakajima et al. [2012] and a new study of bacterial biofilm [Nguyen et al., 2013]. Recent measurements were taken using a middle ear acoustic power analyzer (MEPA) system (HearID, Mimosa Acoustics), which makes …
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SYNTHESIS OF LINEAR MULTIVARIABLE FEEDBACK SYSTEMS IN INFINITE INDEX NORM
… vectors of a system can be determined numerically by an algorithm to solve eigenvalues and eigenvectors of a pencil. To convert the two-sided problem to a one-sided problem and to convert the nonsquare problem to a square problem are related to the spectral factorization which is discussed in …
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Effects of ear-canal geometry and middle-ear pressure on wideband acoustic reflectance
… pressure (NMEP) (Robinson et al., 2016). Additionally, an extensive review of the literature and theory underlying WAI measurements is presented, using both time- and frequency-domain analyses. (1) Measurement probe: The design of a WAI measurement probe and probe tip was conducted with Mimosa …
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Integrated Tunable LC Higher-Order Microwave Filters for Interference Mitigation
… Radio (SDR), where a single digitally-enabled radio is able to cover multiple bands and multiple operating standards. However, in the increasingly hostile RF environment, filtering becomes a bottleneck for SDRs as the traditional off-chip filters are fixed frequency and bulky. …
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Diferenční a pseudodiferenční filtrační obvody
Bakalářská práce se zabývá analogovými kmitočtovými filtry, pracující v diferenčním a~pseudodiferenčním režimu. Je zaměřena zejména na aktivní filtry druhého řádu, které využívají moderních aktivních prvků. U konkrétních řešení je analyzována možnost řízení parametrů filtru. Dále se text zabývá …